Writing instrument



FIG. 1 is an elevated perspective view of the writing instrument of the present invention;

FIG. 2 is a top view thereof;

FIG. 3 is a right-side view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a view of the proximal end thereof; and,

FIG. 7 is a view of the distal end thereof.

The broken lines in the drawings are included to show portions of the writing instrument that form no part of the claimed design. 

CLAIM The ornamental design for a writing instrument, as shown and described. 